Safelock ID / unauthorized Credit Card Charges

I do not know where they came from or how they got my Credit card number, but SafeLock ID showed up on my credit card statement charging my account $38.84. I have called the contact number [protected]) listed on my statement several times a day for two weeks. Every phone call has an automated voice attendant claiming all operators are busy and all back up operators are busy.
I had to cancel my credit card account because these thieves cannot be reached or stopped by any conventional methods.